阅读说明：本技术 一种开关电源电路及冰箱 (Switching power supply circuit and refrigerator ) 是由 胡逢亮 谢冬敏 黄成欢 肖春蕾 张秋俊 林青辉 于 2021-10-25 设计创作，主要内容包括：本发明公开了一种开关电源电路及冰箱,该开关电源电路包括：供电电源；主控芯片,设置有供电端和输入端,所述供电端适于向除味装置供电,所述输入端适于接入供电电压；第一开关电路,所述第一开关电路的控制端用于接收控制指令,所述第一开关电路的第一端与所述供电电源连接,所述第一开关电路的第二端与所述输入端连接；所述第一开关电路根据所述控制指令控制所述第一开关电路的第一端和所述第一开关电路的第二端的通断。如此设置,解决了除味装置的没电问题,保证用户能够正常使用冰箱除味装置,节省了大量的电能。(The invention discloses a switching power supply circuit and a refrigerator, wherein the switching power supply circuit comprises: a power supply; the main control chip is provided with a power supply end and an input end, the power supply end is suitable for supplying power to the odor removing device, and the input end is suitable for being connected with power supply voltage; the control end of the first switch circuit is used for receiving a control instruction, the first end of the first switch circuit is connected with the power supply, and the second end of the first switch circuit is connected with the input end; and the first switch circuit controls the on-off of the first end of the first switch circuit and the second end of the first switch circuit according to the control instruction. So set up, solved odour removal device's the problem of not having the electricity, guarantee that the user can normally use refrigerator odour removal device, saved a large amount of electric energy.)

1. A switching power supply circuit, comprising:

a power supply (VBAT);

the main control chip is provided with a power supply terminal (VCC) and an input terminal, the power supply terminal (VCC) is suitable for supplying power to the odor removing device, and the input terminal is suitable for being connected with power supply voltage;

a first switch circuit, a control end of which is used for receiving a control instruction, a first end of which is connected with the power supply (VBAT), and a second end of which is connected with the input end; and the first switch circuit controls the on-off of the first end of the first switch circuit and the second end of the first switch circuit according to the control instruction.

2. The switching power supply circuit according to claim 1, wherein the main control chip further comprises an output terminal for outputting a control signal.

3. The switching power supply circuit according to claim 2, further comprising:

a control end of the second switch circuit is connected with an output end of the main control chip, a first end of the second switch circuit is connected with the power supply (VBAT), and a second end of the second switch circuit is connected with the input end; and the second switch circuit controls the on-off of the first end of the second switch circuit and the second end of the second switch circuit according to the control signal.

4. The switching power supply circuit according to any one of claims 1 to 3, further comprising:

the key switch is connected with the control end of the first switch circuit and used for outputting the control instruction; when the key switch is closed, the first end of the first switch circuit is conducted with the second end of the first switch circuit; when the key switch is turned off, the first end of the first switch circuit and the second end of the first switch circuit are turned off.

5. A switching power supply circuit according to any one of claims 1 to 3, characterized in that the power supply source (VBAT) is any one of commercial power, a secondary battery or a dry cell battery.

6. The switching power supply circuit according to any one of claims 1 to 3, wherein the first switching circuit includes:

a first switch tube (Q1), wherein a control end of the first switch tube (Q1) is used for receiving the control command, and a first end of the first switch tube (Q1) is grounded;

a second switching tube (Q2), a control end of the second switching tube (Q2) is connected with a second end of the first switching tube (Q1), a first end of the second switching tube (Q2) is connected with the power supply (VBAT), and a second end of the second switching tube (Q2) is connected with the input end;

when the first switch tube (Q1) is conducted, the second switch tube (Q2) is conducted; when the first switch tube (Q1) is cut off, the second switch tube (Q2) is cut off.

7. The switching power supply circuit according to claim 6, wherein the first switching circuit further comprises:

a first resistor (R1), one end of the first resistor (R1) is connected with the control end of the first switch tube (Q1), and the other end of the first resistor (R1) is used for receiving the control command;

a second resistor (R2), one end of the second resistor (R2) is connected with the control end of the first switch tube (Q1), and the other end of the second resistor (R2) is grounded;

and one end of the third resistor (R3) is connected with the second end of the first switch tube (Q1), and the other end of the third resistor (R3) is connected with the control end of the second switch tube (Q2).

8. The switching power supply circuit according to claim 3, wherein the second switching circuit comprises:

a third switching tube (Q3), wherein the control end of the third switching tube (Q3) is connected with the output end of the main control chip, and the first end of the third switching tube (Q3) is grounded;

a fourth switching tube (Q4), a control end of the fourth switching tube (Q4) is connected with the second end of the third switching tube (Q3), a first end of the fourth switching tube (Q4) is connected with the power supply (VBAT), and a second end of the fourth switching tube (Q4) is connected with the input end;

when the third switching tube (Q3) is conducted, the fourth switching tube (Q4) is conducted; when the third switching tube (Q3) is cut off, the fourth switching tube (Q4) is cut off.

9. The switching power supply circuit according to claim 8, wherein the second switching circuit further comprises:

a fourth resistor (R4), one end of the fourth resistor (R4) is connected with the control end of the third switching tube (Q3), and the other end of the fourth resistor (R4) is used for receiving the control command;

a fifth resistor (R5), wherein one end of the fifth resistor (R5) is connected with the control end of the third switching tube (Q3), and the other end of the fifth resistor (R5) is grounded;

one end of the sixth resistor (R6) is connected with the second end of the third switching tube (Q3), and the other end of the sixth resistor (R6) is connected with the control end of the fourth switching tube (Q4).

10. A refrigerator, characterized by comprising:

a deodorizing device;

the switching power supply circuit according to any one of claims 1 to 9, being provided with said main control chip, said main control chip being connected to said odor removing device through a power supply terminal (VCC).

Technical Field

The invention relates to the technical field of refrigerators, in particular to a switching power supply circuit and a refrigerator.

Background

At present, a refrigerator odor removal device is usually arranged in a refrigerator, an ozone generator is arranged in the refrigerator odor removal device, ozone can be generated, and the refrigerator odor removal device has the effects of powerful sterilization and odor removal.

The refrigerator odor removing device needs to be powered by a battery, and in a common situation, the battery of the refrigerator odor removing device is always in a power supply state in the process from the production to the sale of a refrigerator to a client, so that a large amount of electric energy is wasted, and the effective use time of a user is reduced.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is that a battery of a deodorizing device of a refrigerator in the prior art is always in a power supply state, and a large amount of electric energy is wasted, so that a switching power supply circuit and the refrigerator are provided.

To achieve the above object, an embodiment of the present invention provides a switching power supply circuit, including: a power supply; the main control chip is provided with a power supply end and an input end, the power supply end is suitable for supplying power to the odor removing device, and the input end is suitable for being connected with power supply voltage; the control end of the first switch circuit is used for receiving a control instruction, the first end of the first switch circuit is connected with the power supply, and the second end of the first switch circuit is connected with the input end; and the first switch circuit controls the on-off of the first end of the first switch circuit and the second end of the first switch circuit according to the control instruction.

Optionally, the main control chip further includes an output end, and the output end is used for outputting a control signal.

Optionally, the switching power supply circuit further includes:

the control end of the second switch circuit is connected with the output end of the main control chip, the first end of the second switch circuit is connected with the power supply, and the second end of the second switch circuit is connected with the input end; and the second switch circuit controls the on-off of the first end of the second switch circuit and the second end of the second switch circuit according to the control signal.

Optionally, the switching power supply circuit further includes: the key switch is connected with the control end of the first switch circuit and used for outputting the control instruction; when the key switch is closed, the first end of the first switch circuit is conducted with the second end of the first switch circuit; when the key switch is turned off, the first end of the first switch circuit and the second end of the first switch circuit are turned off.

Optionally, the power supply is any one of commercial power, a storage battery or a dry battery.

Optionally, the first switching circuit comprises: the control end of the first switch tube is used for receiving the control instruction, and the first end of the first switch tube is grounded; a control end of the second switching tube is connected with a second end of the first switching tube, a first end of the second switching tube is connected with the power supply, and a second end of the second switching tube is connected with the input end; when the first switch tube is conducted, the second switch tube is conducted; when the first switch tube is cut off, the second switch tube is cut off.

Optionally, the first switching circuit further comprises: one end of the first resistor is connected with the control end of the first switching tube, and the other end of the first resistor is used for receiving the control instruction; one end of the second resistor is connected with the control end of the first switching tube, and the other end of the second resistor is grounded; and one end of the third resistor is connected with the second end of the first switch tube, and the other end of the third resistor is connected with the control end of the second switch tube.

Optionally, the second switching circuit comprises: the control end of the third switching tube is connected with the output end of the main control chip, and the first end of the third switching tube is grounded; a control end of the fourth switching tube is connected with a second end of the third switching tube, a first end of the fourth switching tube is connected with the power supply, and a second end of the fourth switching tube is connected with the input end; when the third switching tube is conducted, the fourth switching tube is conducted; when the third switch tube is cut off, the fourth switch tube is cut off.

Optionally, the second switching circuit further comprises: one end of the fourth resistor is connected with the control end of the third switching tube, and the other end of the fourth resistor is used for receiving the control instruction; one end of the fifth resistor is connected with the control end of the third switching tube, and the other end of the fifth resistor is grounded; one end of the sixth resistor is connected with the second end of the third switching tube, and the other end of the sixth resistor is connected with the control end of the fourth switching tube.

An embodiment of the present invention further provides a refrigerator, including: a deodorizing device; the switching power supply circuit of any one of the above embodiments is provided with the main control chip, and the main control chip is connected with the odor removal device through a power supply end.

Compared with the prior art, the technical scheme of the invention has the following advantages:

1. an embodiment of the present invention provides a switching power supply circuit, including: a power supply; the main control chip is provided with a power supply end and an input end, the power supply end is suitable for supplying power to the odor removing device, and the input end is suitable for being connected with power supply voltage; the control end of the first switch circuit is used for receiving a control instruction, the first end of the first switch circuit is connected with the power supply, and the second end of the first switch circuit is connected with the input end; and the first switch circuit controls the on-off of the first end of the first switch circuit and the second end of the first switch circuit according to the control instruction.

So set up, when switching power supply circuit did not begin working, because control command is not received to first switching circuit's control end, make first switching circuit still be in the off-state, thereby power supply can not be to the main control chip power supply, the main control chip is because there is not the circular telegram, also can not be through the power supply end of its self to odour removal device power supply, and then solved odour removal device's the problem of not having the electricity, guarantee that the user can normal use refrigerator odour removal device, a large amount of electric energy has been saved, user's effective use time has been reduced.

2. According to the embodiment of the invention, the second switch circuit is arranged, so that when the first switch circuit is conducted, the main control chip sends the control signal to the control end of the second switch circuit, and the second switch circuit can conduct the power supply and the main control chip on the control line of the main control chip, thereby realizing the self-locking function of the switch power circuit.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for a worker of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of an overall structure of a switching power supply circuit according to an embodiment of the present invention.

Reference numerals:

VBAT and a power supply; VCC, a power supply terminal; q1, a first switch tube; q2, second switch tube; q3, third switch tube; q4 and a fourth switching tube; r1, a first resistor; r2, a second resistor; r3, third resistor; r4, fourth resistor; r5, fifth resistor; r6, sixth resistor.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a worker skilled in the art without creative efforts based on the embodiments of the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meanings of the above terms in the present invention can be understood in specific cases by a worker of ordinary skill in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

At present, a refrigerator odor removal device is usually arranged in a refrigerator, an ozone generator is arranged in the refrigerator odor removal device, ozone can be generated, and the refrigerator odor removal device has the effects of powerful sterilization and odor removal. The refrigerator odor removing device needs to be powered by a battery, and in a common situation, the battery of the refrigerator odor removing device is always in a power supply state in the process from the production to the sale of a refrigerator to a client, so that a large amount of electric energy is wasted, and the effective use time of a user is reduced.

Therefore, the technical problem to be solved by the invention is that a battery of a deodorizing device of a refrigerator in the prior art is always in a power supply state, and a large amount of electric energy is wasted, so that a switching power supply circuit and the refrigerator are provided.

Example 1

As shown in fig. 1, an embodiment of the present invention provides a switching power supply circuit, including: power supply VBAT, main control chip and first switch circuit. The power supply VBAT is used to supply electric energy.

Specifically, in the embodiment of the present invention, the main control chip is provided with a power supply terminal VCC and an input terminal, where the power supply terminal VCC is adapted to supply power to the odor removing device, and the input terminal is adapted to access a power supply voltage. The control end of the first switch circuit is used for receiving a control instruction, the first end of the first switch circuit is connected with the power supply VBAT, and the second end of the first switch circuit is connected with the input end. And the first switch circuit controls the on-off of the first end of the first switch circuit and the second end of the first switch circuit according to the control instruction.

So set up, when switching power supply circuit does not begin working, because control command is not received to first switching circuit's control end, make first switching circuit still be in the off-state, thereby power supply VBAT can not be to the main control chip power supply, the main control chip is because there is not the circular telegram, also can not supply power to odour removal device through the supply terminal VCC of its self, and then solved odour removal device's the problem of not having the electricity, guarantee that the user can normal use refrigerator odour removal device, a large amount of electric energy has been saved, user's effective use time has been reduced.

In an optional embodiment of the present invention, the main control chip further includes an output terminal, and the output terminal is configured to output a control signal. The control signal may be a PWM signal including a high level signal and a low level signal.

Further, in an embodiment of the present invention, the switching power supply circuit further includes a second switching circuit, a control end of the second switching circuit is connected to the output end of the main control chip, a first end of the second switching circuit is connected to the power supply VBAT, and a second end of the second switching circuit is connected to the input end. And the second switch circuit controls the on-off of the first end of the second switch circuit and the second end of the second switch circuit according to the control signal.

In the embodiment of the invention, the second switch circuit is arranged, so that when the first switch circuit is conducted, the main control chip sends the control signal to the control end of the second switch circuit, and the second switch circuit can conduct the power supply VBAT with the main control chip on the control line of the main control chip. Therefore, even if the control end of the first switch circuit does not receive the control instruction, the first switch circuit can still ensure that the input end of the main control chip is electrified, so that the main control chip can normally work, and the self-locking function of the circuit is realized.

Further, in an embodiment of the present invention, the switching power supply circuit further includes a key switch, the key switch is connected to the control terminal of the first switching circuit, and the key switch is configured to output the control instruction. When the key switch is closed, the first end of the first switch circuit is conducted with the second end of the first switch circuit; when the key switch is turned off, the first end of the first switch circuit and the second end of the first switch circuit are turned off. When the key switch is not pressed, the control command is low level, and the first switch circuit is not conducted. After the key switch is pressed down, the control instruction is high level, the first switch circuit is conducted, and the power supply VBAT supplies power to the main control chip.

Optionally, in an embodiment of the present invention, the power supply VBAT is any one of commercial power, a storage battery or a dry battery.

In an optional embodiment of the present invention, the first switch circuit includes a first switch Q1 and a second switch Q2, a control terminal of the first switch Q1 is configured to receive the control command, and a first terminal of the first switch Q1 is grounded. The control terminal of the second switch transistor Q2 is connected to the second terminal of the first switch transistor Q1, the first terminal of the second switch transistor Q2 is connected to the power supply VBAT, and the second terminal of the second switch transistor Q2 is connected to the input terminal. Specifically, when the first switch Q1 is turned on, the second switch Q2 is turned on, and when the first switch Q1 is turned off, the second switch Q2 is turned off.

Further, in one embodiment of the present invention, the first switching circuit further includes: the circuit comprises a first resistor R1, a second resistor R2 and a third resistor R3, wherein one end of the first resistor R1 is connected with the control end of the first switching tube Q1, and the other end of the first resistor R1 is used for receiving the control command. One end of the second resistor R2 is connected to the control end of the first switch Q1, and the other end of the second resistor R2 is grounded. One end of the third resistor R3 is connected to the second end of the first switch Q1, and the other end of the third resistor R3 is connected to the control end of the second switch Q2. The first resistor R1 and the second resistor R2 should be selected to ensure that the first switch transistor Q1 is in saturation conduction, and the third resistor R3 should be selected to ensure that the second switch transistor Q2 is in saturation conduction. The first switch tube Q1 and the second switch tube Q2 are selected to satisfy the circuit requirements, such as current selection.

Further, in one embodiment of the present invention, the second switching circuit includes: the control end of the third switching tube Q3 is connected with the output end of the main control chip, and the first end of the third switching tube Q3 is grounded. A control end of the fourth switching tube Q4 is connected to the second end of the third switching tube Q3, a first end of the fourth switching tube Q4 is connected to the power supply VBAT, and a second end of the fourth switching tube Q4 is connected to the input end. When the third switching tube Q3 is turned on, the fourth switching tube Q4 is turned on; when the third switching tube Q3 is turned off, the fourth switching tube Q4 is turned off.

The first switch tube Q1, the second switch tube Q2, the third switch tube Q3 and the fourth switch tube Q4 may be any one of a triode, a MOS transistor and a field effect transistor. Of course, the present embodiment is only to illustrate the types of the first switching tube Q1, the second switching tube Q2, the third switching tube Q3 and the fourth switching tube Q4, but not to be limited thereto, and those skilled in the art can change the types according to actual situations, and can achieve the same technical effects.

In an optional embodiment of the present invention, the second switch circuit further includes a fourth resistor R4, a fifth resistor R5, and a sixth resistor R6, one end of the fourth resistor R4 is connected to the control end of the third switching tube Q3, and the other end of the fourth resistor R4 is configured to receive the control command. One end of the fifth resistor R5 is connected to the control end of the third switching tube Q3, and the other end of the fifth resistor R5 is grounded. One end of the sixth resistor R6 is connected to the second end of the third switching tube Q3, and the other end of the sixth resistor R6 is connected to the control end of the fourth switching tube Q4. The fourth resistor R4 and the fifth resistor R5 should be selected to ensure that the third switching transistor Q3 is in saturation conduction, and the sixth resistor R6 should be selected to ensure that the fourth switching transistor Q4 is in saturation conduction. The third switch tube Q3 and the fourth switch tube Q4 should be selected to meet the circuit requirements, such as current selection.

Example 2

An embodiment of the present invention further provides a refrigerator, including: a deodorizing device; the switching power supply circuit of any embodiment is provided with the main control chip, and the main control chip is connected with the odor removing device through a power supply terminal VCC.

So set up, when switching power supply circuit does not begin the during operation, because control command is not received to first switching circuit's control end, make first switching circuit still be in the off-state, thereby power supply VBAT can not be to the main control chip power supply, the main control chip is because there is not the circular telegram, also can not supply power to odour removal device through the supply terminal VCC of its self, and then solved odour removal device's the problem of not having the electricity, guarantee that the user can normal use refrigerator odour removal device, a large amount of electric energy has been saved.

When the refrigerator is turned off, the output end of the main control chip outputs a low level, the third switching tube Q3 is turned off, and the fourth switching tube Q4 is also turned off accordingly. The power supply voltage of the input end of the main control chip is reduced to 0, and the main control chip does not work. Thus, the battery has no power consuming circuitry.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Variations and modifications in other variations may occur to those skilled in the art based upon the foregoing description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.